My father has had a an ulcer on his foot for over a year. What can be done?

Professional care. Offloading of diabetic foot ulcers, good nutrition, glycemic control, regular wound debridement by your physician, and local wound care are essential for wound healing.
Evaluation. The first step in treating a foot ulcer is to determine the cause or causes of the ulcer. There are many factors that can contribute to the problem. See your foot specialist for a thorough evaluation. Dr l.